Golgi apparatus•What is in the vesicles?– Proteins modified by the ER and Golgi– Modified phospholipids•Where do the vesicles go?– To specific parts of the cell•This targeting occurs by special mechanismsinvolving specific targeting signals on proteinmolecules. Vesicles can fuse with the plasmamembrane, go to lysosomes etc. (vesiclescontaining molecules to be recycled go tolysosomes)

This
preview
has intentionally blurred sections.
Sign up to view the full version.

Lysosomes•They are membrane vesiclesfilled withdigestive enzymes(proteases, nucleases)•They are found in animalcells•They have a pH of ~5.0– Hydrolytic enzymes of lysosomes are active at low pHand inactive at neutral pH of the cell cytosol (if the

This is the end of the preview.
Sign up
to
access the rest of the document.